sparkR启动报错,有知道是什么原因的吗?

&get; library("rJava")
&get; library("devtools")
&get; library("SparkR")
[SparkR] Initializing with classpath D:/My Documents/R/win-library/3.3/SparkR/sparkr-assembly-0.1.jar
&get; sc<-sparkR.init()
Launching java with command  C:\Program Files\Java\jdk1.8.0_60/bin/java.exe   -Xmx512m -cp "D:\My Documents\R\win-library\3.3\SparkR\sparkr-assembly-0.1.jar;" edu.berkeley.cs.amplab.sparkr.SparkRBackend C:\Users\qian\AppData\Local\Temp\RtmpM7gHi3\backend_port1ce08c5719
&get; sqlContext<-SparkRSQL.init(sc)
错误: 没有"SparkRSQL.init"这个函数

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